Grate



(No Model.)

H. MATHER.

Grate. No. 233,783. Patented Oct-26,1880.

@incassa ATTORNEY.

NAPEISES, PHOTO-LITHOGRAFHER, wASmNGTnN. b. C.

UNITE 'STATES ATENY Ormea.

GRATE.

SPECIFICATION forming part of Letters Patent No. 233,783, dated October26, 1880.

.Application 'filed June 23, 1880.

.To all whom it may concern Be it known that I, HENRY MATHER, a citizenof the United States, residing in the city and county of Philadelphia,and State of Pennsylvania, have invented a new and useful lmprovement inGrates, which improvement is fully set forth in the followingspecification and accompanying drawings, in which- Figure l is a top orplan view of the grate embodying my invention. Figs. 2 and 3 arevertical sections at a right angle to each other.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention consists of a grate formed of rotary bars, each havingmeans whereby any one of them may be locked without preventing therotation of the others.

Referring to the drawings, A represents the bed-plate, and B the barsforming the grate, said bars consisting of flat plates slottedthroughout their lengths, as at a, and having spurs or teeth a', ofwhich those of the middle bar interlock with those of the adjacent sidebars. Each bar has journals b, which are properly supported on bearingsof the bed-plate, the front journals of the several bars projectingthrough the face-plate of the ash-pit for engagement of a crank orhandle, c, whereby the bars maybe rotated.

Formed with or secured to the front journal of each bar is an eye,perforated plate, or lug, C, in the present case depending from thejournal, so disposed that a pin, D, passed through an opening in thefront wall of the ash-pit will enter the lug of the respective bar andserve to lock the said bar, there being a pin for each lug.

It will be seen that the upper face of the grate presents a iiat, broad,and uniform surface for properly supporting the fuel. A poker may beinserted in the slots a and worked the whole length thereof, in order torake the tire, and air has full access to the same through (No model.)

said slots a, and the space between the spurs or teeth a. The fire maybe shaken at the sides or middle, or both, by rotating the relativebars, to accomplish which the proper pin or all of the pins D arewithdrawn, thus releasing a bar or the hars, and by the application ofthe crank or handle c to the frontjournal of the desired bar, orsuccessively to the journals of all of the bars, and reciprocating thesame, the iire may be nicely shaken or vraked where required, it beingnoticed that the bars are independent of each other. By

i rotating either of the bars so that it assumes a vertical position, asshown by the dotted lines, Fig. 3, the fire may be quickly let down, itbeing noticed that large spaces exist between the bars for the dropping`fuel, the lugs C also acting as stops for preventing complete rotationof the bars.

I am aware that it is not new to make grates with separate sectionswhich have small longitudinal apertures in them 5 also, that it is notnew to make grates with a stationary portion slotted nearly from end toend, and an unslotted screw-shaped portion rotating in a large centralslot or opening of said Xed slotted portion; also, that it is not new tomake a grate all in one piece with zigzag slots; also, that it is notnew to provide a grate made in one piece or in sections with a lug and alocking device whereby the entire grate is fastened at will. I do notclaim any ot' the above constructions.

What I do claim is- Independent rotary bars B, each having a perforatedlug or eye, c, in combination with locking-pins, whereby any one of saidbars may be locked without preventing the rotation of the others.

HENRY MATHER.

Witnesses JOHN A. WIEDERSHEIM, J No. K. PLITT.

